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Finding the Fourth Proportional to 228.76, 315.74 and 151.14

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Solution

The fourth proportional to 228.76, 315.74 and 151.14 is: 208.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.76 : 315.74 = 151.14 : x
  2. Step 2: Convert to fraction form
    228.76/315.74 = 151.14/x
  3. Step 3: Cross multiply
    228.76x = 315.74 × 151.14
  4. Step 4: Simplify right side
    228.76x = 47,720.94
  5. Step 5: Solve for x
    x = 47,720.94/228.76
  6. Step 6: Final answer
    x = 208.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.